High-temperature Dielectric Nanocomposite Film of 2D Bi4Ti3O12/ABS with Excellent Energy Storage Performance

The utilization of high-temperature dielectrics in capacitive energy storage is of great significance in contemporary electronic systems. Nevertheless, the thermal stability of most emerging polymers exhibits a significant decline in their energy storage capacity as temperatures rise. In this study, a unique type of 2D Bi4Ti3O12 nanofillers was synthesized in order to improve the breakdown strength. A nanocomposite consisting of Bi4Ti3O12/poly(acrylonitrile-butadiene-styrene) (ABS) was synthesized with the aim of attaining enhanced dielectric characteristics and energy storage density under elevated temperatures. The Bi4Ti3O12/ABS nanocomposites exhibited notable temperature stability in relation to their dielectric and energy storage capabilities across a temperature range spanning from room temperature to 120 oC. Ultrahigh discharged energy density (Ue) of 12.44 J/cm3 for 3 wt.%- Bi4Ti3O12/ABS nanocomposites and high efficiency of 87% under 550 MV/m were achieved at room temperature. An excellent Ue of 9.12 J/cm3 and high efficiency of 86.2% for 3 wt.%- Bi4Ti3O12/ABS nanocomposites were also observed in 3 wt.%- Bi4Ti3O12/ABS nanocomposites under 450 MV/m at 120 oC, which was 117% and 114% of ABS films. These capacitive performances could match or be higher than previously reported values for high-temperature capacitor applications.